drm/radeon: cleanup: drm_modeset_lock_all() --> DRM_MODESET_LOCK_ALL_BEGIN()

As requested in Documentation/gpu/todo.rst, replace driver calls to
drm_modeset_lock_all() with DRM_MODESET_LOCK_ALL_BEGIN() and
DRM_MODESET_LOCK_ALL_END()
Signed-off-by: Fernando Ramos <greenfoo@u92.eu>
Signed-off-by: Sean Paul <seanpaul@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20210924064324.229457-9-greenfoo@u92.eu

drivers/gpu/drm/radeon/radeon_device.c

@@ -37,6 +37,7 @@
 #include <drm/drm_cache.h>
 #include <drm/drm_crtc_helper.h>
 #include <drm/drm_device.h>
+#include <drm/drm_drv.h>
 #include <drm/drm_file.h>
 #include <drm/drm_probe_helper.h>
 #include <drm/radeon_drm.h>
@@ -1559,7 +1560,8 @@ int radeon_suspend_kms(struct drm_device *dev, bool suspend,
 	struct pci_dev *pdev;
 	struct drm_crtc *crtc;
 	struct drm_connector *connector;
-	int i, r;
+	struct drm_modeset_acquire_ctx ctx;
+	int i, r, ret;
 
 	if (dev == NULL || dev->dev_private == NULL) {
 		return -ENODEV;
@@ -1573,12 +1575,15 @@ int radeon_suspend_kms(struct drm_device *dev, bool suspend,
 
 	drm_kms_helper_poll_disable(dev);
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	/* turn off display hw */
 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 		drm_helper_connector_dpms(connector, DRM_MODE_DPMS_OFF);
 	}
-	drm_modeset_unlock_all(dev);
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
+
+	if (ret)
+		return ret;
 
 	/* unpin the front buffers and cursors */
 	list_for_each_entry(crtc, &dev->mode_config.crtc_list, head) {
@@ -1663,7 +1668,8 @@ int radeon_resume_kms(struct drm_device *dev, bool resume, bool fbcon)
 	struct radeon_device *rdev = dev->dev_private;
 	struct pci_dev *pdev = to_pci_dev(dev->dev);
 	struct drm_crtc *crtc;
-	int r;
+	struct drm_modeset_acquire_ctx ctx;
+	int r, ret;
 
 	if (dev->switch_power_state == DRM_SWITCH_POWER_OFF)
 		return 0;
@@ -1741,11 +1747,14 @@ int radeon_resume_kms(struct drm_device *dev, bool resume, bool fbcon)
 	if (fbcon) {
 		drm_helper_resume_force_mode(dev);
 		/* turn on display hw */
-		drm_modeset_lock_all(dev);
+		DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 		list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 			drm_helper_connector_dpms(connector, DRM_MODE_DPMS_ON);
 		}
-		drm_modeset_unlock_all(dev);
+		DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
+
+		if (ret)
+			return ret;
 	}
 
 	drm_kms_helper_poll_enable(dev);

drivers/gpu/drm/radeon/radeon_dp_mst.c

@@ -4,6 +4,7 @@
 #include <drm/drm_fb_helper.h>
 #include <drm/drm_file.h>
 #include <drm/drm_probe_helper.h>
+#include <drm/drm_drv.h>
 
 #include "atom.h"
 #include "ni_reg.h"
@@ -737,11 +738,12 @@ static int radeon_debugfs_mst_info_show(struct seq_file *m, void *unused)
 	struct radeon_device *rdev = (struct radeon_device *)m->private;
 	struct drm_device *dev = rdev->ddev;
 	struct drm_connector *connector;
+	struct drm_modeset_acquire_ctx ctx;
 	struct radeon_connector *radeon_connector;
 	struct radeon_connector_atom_dig *dig_connector;
-	int i;
+	int i, ret;
 
-	drm_modeset_lock_all(dev);
+	DRM_MODESET_LOCK_ALL_BEGIN(dev, ctx, 0, ret);
 	list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
 		if (connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort)
 			continue;
@@ -759,8 +761,8 @@ static int radeon_debugfs_mst_info_show(struct seq_file *m, void *unused)
 				   radeon_connector->cur_stream_attribs[i].fe,
 				   radeon_connector->cur_stream_attribs[i].slots);
 	}
-	drm_modeset_unlock_all(dev);
-	return 0;
+	DRM_MODESET_LOCK_ALL_END(dev, ctx, ret);
+	return ret;
 }
 
 DEFINE_SHOW_ATTRIBUTE(radeon_debugfs_mst_info);